I ran a test with the 2.12 patch, and the ability did not work for the Queen of the Lake. She was down to 3 hitpoints, and only went back to 31 hitpoints on the next round (her Regeneration was of 28 hitpoints) instead of her full 55 hitpoints.
I see no changes that could apply to the Queen of the Lake with the 2.13 patch, so I guess the results would be the same. But be my guest to test it out with the new patch and/or the other Queens.
